How to edit gaming videos for youtube with blender?
Blender has a VERY steep learning curve when it comes to video editing. You should have some basic knowledge of blender before editing videos. But I have found this good tutorial, it should be easy for beginners, and it's up-to-date.

https://www.youtube.com/watch?v=42AQ_EtRVq4

If blender is too difficult I would recommend Kdenlive.